Claude Sonnet 4.6 API
About
Build advanced reasoning agents with Claude Sonnet 4.6, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support. Access Claude Sonnet 4.6 via the Kenari API with up to 64K output tokens.
Capabilities
Input Modalities
textimagepdf
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
64K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
Claude Sonnet 4.6 by Kenari costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
ID
claude-sonnet-4-6
Provider
KenariFamily
claude-sonnet
Release Date
Feb 17, 2026
Knowledge Cutoff
Aug 31, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
KENARI_API_KEY
API Base URL
https://kenari.id/v1